Improvement in stone-dressing machines



GEORGE A. FULLERTUN. Improvement in Stone-Dressing Machine. l910.127,58@Patentedlune 4.1872.

AMPHaTo-Lm/ocmm//c caMnfossoa//E's fwocfss) UNITED STATES PATENT,O'EEIoEc GEORGE A, FULLERTON, O'F BOSTON, MASSACHUSETTS.

IMPROVEMENT IN STONE-DRESSlNG MACHINES.

Specification forming part of Letters Patent No. 127,589, dated June 4,1872.

SPEoiFrcATIoN.

I, GEORGE A. FULLEEroN, of Boston, in the county of Suffolk and State ofMassachusetts, have invented certain Improvements in Stone-DressingMachines, of which the fol- 1y, and revolving the granite, or othersubstance, in such a manner as to expose every portion of its surface toa mechanical action upon the stone, Snc., as near like that produced byhand labor as possible, thereby dressing the stone as efficiently andmore expeditiously and economically than by the ordinary method ofdressing the stone by hand. My improvements consist mainly of a seriesof mechanical devices, to be fully explained in due course, so arrangedand operated as to allow a granite or other slab or block to be carriedbackward and forward longitudinally and laterally and to be revolvedbelow a series of adjustable hammers and cutters so arranged as tostrike at different times and in various positions on the stone or othersubstance below them in such a manner as to effectually dress the stone,&c.

a a. a in the drawing, represent the frame of my machine formed at thetop with a crossplate, b, and connecting at the bottom with a bed orplatform, c c, formed with travelingways c e', which receive rollers d del connected by shafts d d d with a second bed or platform, e e, whichis provided with travelingways e e', in which travel rollers G Goperated by shafts H H supported by standards I I attached to a third orupper platform or bed, K. Instead of the rollers d d d and their shaftsd d d and the rollers G G and their shafts H H, operating in the ways oc and e e', the platforms may be made to travel on each other by anysuitable arrangement that I may prefer to adopt. Attached to theplatform e e are several parallel cam-bars f f f, each formed withcurved indentures f f jl, 85e., arranged alternately' with those on itsparallel bar.

Engaging with the cam-bars f f f are eccentric cams g g g connected with-a shaft, h h, turning in the sides of the bed or platform c c andoperated by the center one of three belt-wheels, t' t" fi, arranged withstraight and cross belts for the purpose .of reversing the action of theshaft h h. Operated by the shaft h h is a beltwheel, k, on the outsideof the frame a a a, connecting with a belt-wheel, l, that actuates avertical gear, m, engaging with a horizontal gear, n, which revolves afeathered shaft, o, that actuates a horizontal adjustable gear, p, whichengages with a vertical gear, q, which operates a horizontal shaft, r1', supported by standards r r attached to an adjustable plate,

Yw w. Attached toand revolving with the shaft r o' are cams s s s s s,arranged at proper intervals and at different angles with each other soas' to operate in such a manner as to connect with, and disengage from,one at a time with a top of a series of bush-hammers, t t, andpointing-hammers a u, arranged alternatelywith each other and so as toswing forward and backward on a shaft, c o, supported by standards t oformed on the plate w fw.

Supported by standards x w attached to the cross-plate b, is a shaft, y,formed at each end with gears z z that enga-ge with gears A A', andoperate screw-shafts B B which engage with screw-threads formed in theends of the plate w w, so as to raise and lower the plate w w and theseveral devices connected with it in the slots C O', formed in the framea a.. The screw-shafts B B and feathered shaft o find seats in bearingsD D and E, connected with the frame a a a. The shaft y is operated by acrank, F, or by any other suitable means. The bush-hammers t t areformed with bearings Q Q which support an axle, R, on which revolvecutters S S; these cutters S S may be formed in one circular piece withserrated periphery, or they may be of separate circular pieces withsharpened edges put together to form substantially one piece withserrated periphery, as in the former arrangement, or in either case thecutters may be made stationary so as not to revolve on the aXle Ii. Thepointing-hammers u u are arranged to swing on the shaft v c and also torevolve, and are supplied with a series of cutters, T T T, held in slotsformed at intervals in the periphery of the lower portion of the hammeru by the bottom or flange U ofthe stem of the hammer u, or by any othersuitable method'. The hammers t t and u u may be arranged so as tooperate singly by an independent wheel and belt or other suitable motivepower, and the cutters S T may be fed around by any suitable means, orrevolved and rotated by the power produced by the blow of the cutters ST upon the stone, Svc., or they may be fixed in the hammers t t u u u soas to dress the stone, &c., by a blow produced by the cutters S T simplyfalling upon it. The platform K is formed with a turn-table, L, in itscenter for the purpose of revolving the stone,l so as to more readilyassist in the adjustment of every part of its surface to the iniuence ofthe cutters S and T; and has attached to its under side a zigzag orW-shaped slotted piece, M, formcd with a zigzag slot, M, as shown inFig. 8, which travels on a stem, N, attached to the bottom O of themachine.

The operation of my invention is as follows: Power being applied to thecenter belt-wheel i revolves the shaft h h and engages the cams g g gwith the cam-bars f f f, thereby causing the bed or platform e e totravel longitudinally by means of the rollers l l d operating in theways c c, or by any other suitable method for producing the like result,and at the same time the longitudinal passage ofthe platform or bed c ecauses the zigzag slot M', of the slotted piece M, to travel on the stemN in such -a manner as to carry, by means of the rollers G G, travelingin the ways c c, or by any other means adapted to the purpose, the upperbed or platform K backward and forward laterally on the platform c e,which, when it reaches the end of its course, is made to travel backwardby the reverse action given 7 to the shaft h h by the shifting of thebelt on the belt-wheel i. By the action above described the stone orother substance, which is placed on the upper platform or bed K, iscarried forward and backward both laterally and longitudinally, and maybe revolved if desired by the use ofthe turntable L, so that any andevery part of the stone, Src., will be brought in contact with thecutters of the hammers and be dressed to a perfectly level surface. Byoperating' the shaft h h motion ,is communicated by means of the gears mnp q to the feathered shaft O and horizontal shaft i' fr, thus causingthe cams s s s s s to strike and pass over alternately, one at a time,the heads of the hammers t t and u u u., thereby swinging the hammers tt and u u u up and then suddenly letting them fall so as to bring thecutters S T heavily in contact with the top of the stone, &c., travelingbelow them, each blow on the stone causingA the cutters S S to revolve,and the cutters T T T to rotate after each stroke, producing a revolvingintermittent blow upon the stone, &c.,si`milar to that made by theturning of the chisel in the hands of a stonecutter. The plate w w, andconsequen tly the hammers t t and a u u connected with it, are raisedand lowered to accommodate slabs of any thickness to be admitted belowthem, by means of the screw-shafts B B enga-ging with female screwsformed in the ends of the plate w w and operated by the shaft y whosegears z z engage with the gears A A of the shafts B Bf, thefeathered-shaft 0 allowing the gear p to be raised or lowered so as toconnect with the gear g as the plate w is changed in height.

Having thus fully described my improvements, what I claim as myinvention and desire to have secured to me by Letters Patent, is-

l. The platform K, formed with a turn-table L, when combined with thefollowing elements-wiz.: the shafts H, rollers G, zigzag slot-piece M,stem N, and reciprocating-frame e-all as specified.

2. The frame e, when combined with the shafts d', rollers d, cam-barf,cam g, and bed c, all as described.

3. The swinging hammer t or u, when made to revolve on itssocket, as setforth.

4. The zigzag slot-piece M with zigzag slot M traveling on the stem N,the whole in cornbination with the platform K, frame e, and bed c, shafth, cam-barf, cam g, and belt-wheel i, substantially as explained.

1u testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. l

GEORGE A. FULLERTON.

Witnesses:

SMIL. M. BARTON, GARRoL D. WRIGHT.

